Kuidas toimub andmetöötluse vahe- etappide identifitseerimine voogude operatsioonides?

In the Java Stream API, intermediate operations are identified by their lazy nature: they return a new Stream and do not start data processing immediately. This distinguishes them from terminal operations, which initiate calculations.

Intermediate operations can be recognized because they return a Stream and allow chaining calls, for example:

Stream<String> stream = list.stream()
    .filter(s -> s.startsWith("A"))  // intermediate operation
    .map(String::toUpperCase);         // intermediate operation

Here, filter and map are intermediate operations; they do not perform processing immediately but form a pipeline. Processing will start only when a terminal operation, such as collect or forEach, is invoked.

Thus, the identification of intermediate stages is based on their return type (Stream) and their lazy behavior.